Expedited analysis of DFT outputs: Introducing moanalyzer

MOAnalyzer, a Matlab‐based program, has been developed to facilitate the analysis of density functional theory output files from ORCA. The program allows the user to define fragments within a molecule and then provides information on the contribution of each fragment to the molecular orbitals based on the Loewdin population analysis. Correlations to spectroscopy (X‐ray absorption and X‐ray emission) are also obtained, and the resulting information can be visualized in tables or MO diagrams. © 2012 Wiley Periodicals, Inc.     

Development of Matlab filtering techniques in digital speckle pattern interferometry

In interferometric fringe pattern analysis, specular and speckle fringe patterns are the two main divisions. While specular fringes are characterized by quality fringes, speckle (that obtains due to the diffuse scattering of the coherent radiation from an optically rough surface) fringe patterns are characterized by noisy fringes. This paper concentrates on this aspect and the Matlab based filtering methods to improve the quality of speckle fringe patterns by developing the appropriate software. Further, the newly developed software “Macurv” will be presented which can give the second order derivative (curvature) fringe information. A software with several functions is written using Matlab. The objective of the software is to provide a more effective way for the post-processing of speckle interferometric fringes. The algorithm and functions of the developed software “Macurv” will be explained.     

Mie theory 1908, on the mobile phone 2008

Hundred years ago Gustav Mie published his famous paper on the theory of light scattering by spherical particles. It has been programmed in many programming languages since invention of the computer. Nowadays with the mobile phone becoming an educational tool it would be of interest to port a Mie scattering application to a Java enabled hand set. The objective of this paper is to investigate the feasibility of porting existing Mie software to a hand held device. We will show that the mobile phone can be an advanced programming environment for the Mie theory and we will present some exemplary computational results.     

基于Schwarz-Christoffel变换的平板电容器电场电荷分布仿真

本文利用施瓦兹-克里斯多菲（S-C）变换,得出并讨论了计及边缘效应的平行板电容器的电场、电荷分布函数.利用离散化与数值迭代的方法,通过Matlab数值仿真得出了其电场和电荷分布的较精确的可视化结果.     

基于零空间基的非线性结构分析方法

根据零空间基和M－P广义逆理论,推导了结构非线性增量平衡方程极值点与非临界点解的统一形式,并直接表示为增广矩阵零空间基的形式。 研究了基于M－P逆、奇异值分解和伪上三角分解确定零空间基的三种数值方法,以及据此求增量平衡方程增量解的方法。利用Matlab语言,在Matlab集成环境下实现了非线性结构分析算法,并研究了算法的效率与稳定性。最后,给出了两个详细的数值分析算例,结果表明该方法正确有效,可适宜中等规模的结构分析。     

超磁致伸缩换能器的磁滞非线性动力学仿真

在超磁致伸缩材料输出端位移假设的基础上,建立了以输出顶杆为研究对 象、考虑材料内部磁滞非线性及预压弹簧特性的超磁致伸缩换能器非线性动力学模 型; 并将Simulink仿真系统应用到超磁致伸缩换能器系统动力学仿真中. 仿真结果表 明: 换能器模型系统为稳定周期运动系统,并具有滞回非线性特性;弹簧非线性项中的平方 项是影响换能器模型系统的主要因素. 经验证,数值计算结果与文献给出的试验测试结果吻 合较好.     

核磁共振实验的计算机辅助教学

基于核磁共振的经典理论——Bloch方程,运用Matlab程序对核磁共振实验的各个环节(观察核磁共振信号、自由衰减信号、自旋回波信号等)进行了可视化模拟,帮助学生认识和理解核磁共振,辅助实验教学.     

基于Simulink和C++混合编程的测试系统建模技术研究

介绍了一种基于Simulink和C++混合编程技术的自动飞行控制系统测试系统建模技术及调试方法;基于Simulink搭建飞行仿真模型,通过RTW自动代码生成工具将各仿真模块分别生成嵌入式代码,并集成应用于C++软件设计环境中;通过对时钟的有效设定,实现了基于Windows系统的实时飞行仿真测试系统的设计,仿真软件的最小运算周期为2 ms;该技术不仅可以满足自动飞行控制系统飞行仿真试验的实时性要求,并且在软件开放性、接口扩展性、板卡驱动的通用性以及软件设计功能多样性等方面占有较大优势;基于这个技术建立而成的仿真测试系统,某型自动飞行控制计算机已经成功的开展了多轮半物理仿真验证试验,并取得了良好的试验效果,从而为产品的试飞定型奠定了坚实的基础。     

Matlab软件在牛顿环实验数据处理方法上的创新

运用了用Matlab软件的功能函数对牛顿环测量平凸透镜的曲率半径实验的数据进行处理,简化了数据处理过程,提高了实验结果的准确度;同时也提高了我们大学生应用软件的能力,激发了学习兴趣,提高了教学质量。